Mary wants to decorate her Christmea tree. She wants to place the tree on a wooden block covered with coloured paper with picture of Sants Claus on it. She must know the exact quantity of paper to buy for this purpose. If the box has length, breadth and height as 80 cm, 40 cm and 20 cm respectively. How many square sheets of paper of side 40 cm would she require?
Answers
Mary would require 7 sheets of paper to decorate her Christmas tree.
Step-by-step explanation:
Given :
Length (l) of the wooden block = 80cm
Breadth (b) of the wooden block = 40cm
Height (h) of the wooden block = 20cm
Surface Area of the wooden box = 2[lb + bh + hl]
= 2[(80 × 40) + (40 × 20) + (20 × 80)]
= 2 [3200 + 800 + 1600]
= 2[5600]
= 11200 cm
Surface Area of the wooden box = 11200 cm²
Given : side of square sheet paper = 40 cm
Area of square = side × side
Area of each sheet of the paper = 40 × 40
= 1600 cm²
Now,
Total number of sheets required = (Surface area of the box )/(Area of one sheet of paper)
= 11200/1600
= 7
Hence, Mary would require 7 sheets of paper.
Hope this answer will help you…
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Given :
- Length of the wooden block = 80cm
- Breadth of the wooden block = 40cm
- Height of the wooden block = 20cm
- side of square sheet paper = 40 cm
Solution:
using this formula
- Surface Area of the wooden box = 2[lb + bh + hl]
= 2[(80 × 40) + (40 × 20) + (20 × 80)]
= 2 [3200 + 800 + 1600]
= 2[5600]
= 11200 cm
Surface Area of the wooden box = 11200 cm²
Now,
Area of square = side × side
Area of each sheet of the paper = 40 × 40
=> 1600 cm²
- Total number of sheets required = (Surface area of the box )/(Area of one sheet of paper)
= 11200/1600
= 7
Therefore, Mary would require 7 sheets of paper.